HELP - Assertion Failed trying to open Tool Palette

Hi all, we are having a continued error message, related to the attempted opening of the tool palette, from both the source/record monitor, and the settings list in the project window. This only occurs when logging in through network account. Please see below.

As previously mentioned, we use network log ins, which uses the local student profile for it's settings. Both the local admin and student, do not show this error when opening the tool palette, furthermore, if one logs in on a network account, opens MC using the network user prfile, error, then imports the student user profile, the error will not appear and the tool palette behaves as expected, switch back to the newly created network users profile, the error has gone too and the palette works. We can also duplicate the tool palette in the settings and activate it, then delete the original, and it works on the network user profile. We have tried deleting numerous settins files, to no success. Any ideas?

The work around is fine for me, but we have many client machines used by students, and for it to work as it should will save me far more time in the future.